o PREDICTING EFFECTIVE BIOLOGICAL DOSES FRCM DOSE-RATE READTKCS "ff Ce Mexivun i :@ (Pasod on Bist ketiBated Hate Biological of Decay} Factor. From time of fallout until time of evacuation From tine cf evecue ation +> tine of revurii* From i7> 2 of reterca to a tins 15 dsys efter initial fallout** From 15 ceve until ou2 xe Uf Fiar iniiiu Zout , A¢wenunction fad Wertharing Feovor De Ee cffeetinve Frfective ( Coluz (Cokunnsy Piologicsl ose Factor Ey eC) V/1 1/2 1/2 3/4, hh V/20ee 3/4, aft Ver e# 2/3 1/2 V3 TOWT, 2 —_ iene *This .- imate is based on the concent that if evacuavion were 22 cecomplished, then a certain radisvion devs wouls bo cgewarlevcd over the peried of toee eclec ied, The 8 tine Period z2leo represents toa radiation dese saved if cvecustion vers accom;ished, ‘ FeThis assuces that the tine of re turn occurs bofors 15 Gays. A poriod of 15 deys was selected to provide a dividing point tctween the tines of jnitiel exposure from fallout to a timo one yeer later. The 15 anys eg ro uniau. sicnificance other than providing a vasis on which to esiiuate the bDicic ical factor, **kThe velue of 9/16 has been rounded off to 1/2. fuaclormtesl Hage 1 ~nf eR,eeee ee